Well yeah I did think that he tried to answer dutch's question "I am, I am... ahh what the hell I just blow you up". Oh and what makes you think either of them was first time around on earth? Maybe they were here so often that they learnt to speak english on their previous hunts.
And from watching that scene with elder, I came to think that they aren't so social. They cloak themselves even when they're together and ain't hunting. So they probably don't talk too much either.